Compatible Models - Cousper 3-Pack soft sport silicone bands compatible with Apple Watch 38mm/40mm Series SE, Series 6, Series 5, Series 4, Series 3, Series 2, Series 1Size Chart - The size of 38mm/40mm S/M is for 5.1''-7.1''(130mm-180mm) wrist, and the size of 38mm/40mm M/L is for 5.9''-7.9''(150mm-200mm) wristUpgrated Material - Cousper bands are made of pure silicone and flexible elastomer, sweat-resistant, lightweight and skin-friendly. Offer you a different experience when Running, Swimming, Climbing, Hiking, Camping and TravelingEasy Installation and Safety Buckle - The replacement watch bands with hypoallergenic nickel upgrade Buckle, it resolved rusty problem make skin-friendly. Fashionable silicone bands come with watch lugs on both ends which lock onto your Apple Watch precisely and securely, for easy installation and removalVarious Color Choices - Multiple combination colors choices make you different from others and fit any occasions, dress or mood in your daily life, a great choice for men and women